circuitpython/ports/stm32f4/supervisor/usb.c

/*
 * This file is part of the Micro Python project, http://micropython.org/
 *
 * The MIT License (MIT)
 *
 * Copyright (c) 2018 hathach for Adafruit Industries
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */


#include "tick.h"
#include "supervisor/usb.h"
#include "lib/utils/interrupt_char.h"
#include "lib/mp-readline/readline.h"
#include "stm32f4xx_hal.h"

#define USB_OTGFS_VBUS_Pin GPIO_PIN_9
#define USB_OTGFS_VBUS_GPIO_Port GPIOA
#define USB_OTGFS_ID_Pin GPIO_PIN_10
#define USB_OTGFS_ID_GPIO_Port GPIOA
#define USB_OTGFS_DM_Pin GPIO_PIN_11
#define USB_OTGFS_DM_GPIO_Port GPIOA
#define USB_OTGFS_DP_Pin GPIO_PIN_12
#define USB_OTGFS_DP_GPIO_Port GPIOA


void init_usb_hardware(void) {
  GPIO_InitTypeDef GPIO_InitStruct = {0};
  __HAL_RCC_GPIOA_CLK_ENABLE();
  /**USB_OTG_FS GPIO Configuration    
  PA10     ------> USB_OTG_FS_ID
  PA11     ------> USB_OTG_FS_DM
  PA12     ------> USB_OTG_FS_DP 
  */
  GPIO_InitStruct.Pin = USB_OTGFS_ID_Pin|USB_OTGFS_DM_Pin|USB_OTGFS_DP_Pin;
  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
  GPIO_InitStruct.Alternate = GPIO_AF10_OTG_FS;
  HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

  /* Peripheral clock enable */
  __HAL_RCC_USB_OTG_FS_CLK_ENABLE();

  /* Peripheral interrupt init */
  HAL_NVIC_SetPriority(OTG_FS_IRQn, 0, 0);
  HAL_NVIC_EnableIRQ(OTG_FS_IRQn);
}